This is true of any API from a for-profit company, just look at the problems with Google Maps and Twitter. If I were making a startup today, I would not piggy back off any of these social APIs for this reason.
The problem, and I speak from first hand experience here, is that its increasingly hard to make a successful consumer product that does not leverage these apis. They are accelerants, and if our primary goal is to find product market fit and take the market before anyone else, not using those accelerants can be quite detrimental.